Wireless speaker



FIG. 1 is a front perspective view of a wireless speaker showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

Broken lines shown in the drawings represent unclaimed portions of the wireless speaker and form no part of the claimed design. 

CLAIM The ornamental design for a wireless speaker, as shown and described. 